Under open sky, modern iPhones are often accurate within a few meters. But the useful answer is not a single number. Accuracy changes with environment, motion, and how much sky your phone can actually see.
What Counts as Good Accuracy
- ▶3-5 meters: excellent, usually open sky or very clean conditions.
- ▶5-10 meters: still strong and useful for most hiking and travel scenarios.
- ▶10-20 meters: usable, but you should read the surroundings carefully.
- ▶20+ meters: degraded. You may need more time, more sky, or a better position.
Why Accuracy Gets Worse
- Tall buildings reflect signals and create multipath errors.
- Heavy tree cover weakens satellite visibility.
- Metal roofs, cabins, and airplane fuselages block the sky.
- A receiver that just opened may still be settling into a stronger fix.
Accuracy is not a promise
It is an estimate of the likely error radius around your current position. Smaller is better.
What To Do When the Number Is Bad
- ▶Wait 15-30 seconds before moving.
- ▶Move toward open sky or a window.
- ▶Avoid judging the fix while the phone is buried in a pocket or bag.
- ▶Use the number as your go-or-no-go check before saving or sharing a location.
Why This Matters More Than the Blue Dot
A map app can make an inaccurate position look confident. A clean GPS utility does the opposite: it tells you how trustworthy the fix is before you act on it. That is the difference between decoration and instrumentation.
SkyLocation's Approach
SkyLocation surfaces the raw accuracy number next to your coordinates, altitude, and speed so you can judge the fix in real time. That is especially useful in airplanes, cities, mountains, and emergency situations where false confidence is expensive.
Read your location with the accuracy number in plain view.
